Beach/Shore Blind

I have a private body of water that a lot of birds love where water is way down. The only problem is that their favorite spot to hang out is on a stretch of shore where they have about 40 feet of sandy shore between the water and the summer shoreline. Was wondering if anyone had any good ideas for a blind we could set up to get us a better shot at some birds. There are lots of timber piles lining the shore. We're hoping to build a sturdy blind that we can pull out when the water comes back up. Thanks in advance!